I'm currently checking out https://github.com/sagemath/sage/pull/35103 and
browsing through old issues (there should be one speeding up
add_constraint, because indeed for the current problem most of the time
(according to %prun) is spent in add_constraint, and I reported and fixed
some of these a long time ago, but apparently, they never made it into
sage. what a waste).
I'll look into the other options after that! Thank you so much!
Martin
On Friday 16 February 2024 at 20:31:15 UTC+1 Dima Pasechnik wrote:
On Fri, Feb 16, 2024 at 7:25 PM 'Martin R' via sage-devel <
sage-...@googlegroups.com> wrote:
Oh no, sorry, this was a typo!
YES SCIP WORKS!
Only, for some reason this is now slower than GLPK - I'm lost. I'll look
through the tickets, I think there was a specific one responsible for big
speedups.
you've installed a binary blob, which is almost surely suboptimal for your
CPU.
Did you try cbc package? It's also a faster than GLPK LP solver.
Or get an academic license for GUROBI.
Thank you so much for your support!
Martin
On Friday 16 February 2024 at 20:18:42 UTC+1 Dima Pasechnik wrote:
You need an SPD solver - it's a different package, scip_sdp, not pyscipopt.
Try
make scip_sdp
(probably followed up by "make build", just in case)
On 16 February 2024 18:39:52 GMT, 'Martin R' via sage-devel <
sage-...@googlegroups.com> wrote:
Any hope left? If not, which version of sage do I have to downgrade to?
Thank you for all the hints so far!
Martin
martin@toolbox:~/sage-trac$ ./sage -pip install pyscipopt
Collecting pyscipopt
Downloading
PySCIPOpt-4.4.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata
(8.3 kB)
Downloading
PySCIPOpt-4.4.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
(12.9 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 12.9/12.9 MB 5.3 MB/s eta 0:00:00
Installing collected packages: pyscipopt
Successfully installed pyscipopt-4.4.0
martin@toolbox:~/sage-trac$ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 10.3.beta8, Release Date: 2024-02-13 │
│ Using Python 3.10.12. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: default_sdp_solver("SCIP")
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
...
On Friday 16 February 2024 at 18:33:07 UTC+1 Dima Pasechnik wrote:
But you can be lucky with the binary wheel you can get from PyPI. I didn't
test it though, but perhaps it will just work.
On Friday, February 16, 2024 at 4:55:21 PM UTC Matthias Koeppe wrote:
As noted in
https://github.com/sagemath/sage/wiki/Sage-10.2-Release-Tour#known-problems-and-workarounds,
our pyscipopt package has not been updated to work with Cython 3 yet.
(Still the same in upstream PySCIPOpt master, as noted
https://github.com/scipopt/PySCIPOpt/pull/630#issuecomment-1938080592)
On Friday, February 16, 2024 at 7:48:09 AM UTC-8 Martin R wrote:
I (urgently) need the scip MILP solver (on 10.3.beta8, Ubuntu 22.04).
sage -i pyscipopt
ends with
***************************************************************
Error building Sage.
The following package(s) may have failed to build (not necessarily
during this run of 'make pyscipopt'):
* package: numpy-1.26.2
last build time: Feb 4 18:46
log file: /home/martin/sage-trac/logs/pkgs/numpy-1.26.2.log
* package: pyscipopt-4.3.0
last build time: Feb 16 16:44
log file: /home/martin/sage-trac/logs/pkgs/pyscipopt-4.3.0.log
It is safe to delete any log files and build directories, but they
contain information that is helpful for debugging build problems.
WARNING: If you now run 'make' again, the build directory of the
same version of the package will, by default, be deleted. Set the
environment variable SAGE_KEEP_BUILT_SPKGS=yes to prevent this.
make: *** [Makefile:40: pyscipopt] Error 1
The log is attached.
Please excuse me posting to the wrong list, etc.
Martin
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